1 // Copyright 2022 Google LLC 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 // 15 //////////////////////////////////////////////////////////////////////////////// 16 17 package com.google.crypto.tink.mac; 18 19 import com.google.errorprone.annotations.Immutable; 20 import java.security.GeneralSecurityException; 21 22 /** 23 * An interface representing Streaming MAC. 24 * This interface should only be used for authentication. It should NOT 25 * be used for other purposes; for instance, it is not guaranteed that this interface produces 26 * pseudorandom bytes. 27 */ 28 @Immutable 29 public interface ChunkedMac { 30 /** 31 * Creates an instance of a single Chunked MAC computation. 32 */ createComputation()33 ChunkedMacComputation createComputation() throws GeneralSecurityException; 34 35 /** 36 * Creates an instance of a single Chunked MAC verification. 37 */ createVerification(final byte[] tag)38 ChunkedMacVerification createVerification(final byte[] tag) throws GeneralSecurityException; 39 } 40